Possio has updated its product line to add the PX40, which handles UMTS: Like its predecessor, the PX30, and a similar product from Junxion, the PX40 acts as a gateway to hook into a cellular data network and route the Internet to Ethernet and Wi-Fi users. The PX40 has integral UMTS support (for two popular flavors); its predecessor was more of an enabling tool without integral network connectivity, and the Junxion Box accepts PC Cards for a variety of cell data uplinks.
The PX40 displays SMS messages as well as sends them: this SMS feature is needed for certain networks that use SMS as part of the provisioning. It also has a built-in 802.1X supplicant, so it can make an authenticated network connection where needed. (802.1X in this context is like PPPoE support in home gateways: you need the end-point device to act precisely like a client.) [link via OSGi]
By the way, Junxion was featured in Business 2.0 recently, but not by name: the Stay Connected element of the Google shuttle bus from SF to Mountain View is a Junxion Box.